Dust-collector.



No. 810,771. PATBNTED JAN. 23, 1906.

B. KERN, JB. DUST COLLECTOR.

APPLICATION FILED JAN. 27, 1905.

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No. 810,771. PATENTED JAN.'23, 1906. B.'KERN, Jn.

DUST COLLECTOR.

APPLIOATAIONV FILED 11111.27. 1905.

2 SHEETS-SHEET 2.

UNITED STATESv PATENT OEETOE..

BERNARD KERN, JR., OF TOLEDO, OHIO. DusT-coLLEQ'l-on.

Specification of Letters Patent.

Patented Jan. .23, ieee.

.'xplication filed January 27, 1905, Serial No. 242,833.

I l To @ZZ whom it may concern.-

Be it known that I, BERNARD KERN, Jr., a

. citizen ofthe United States, and a resident of l' Toledo, in theVcounty of Lucas and State of y Ohio, have invented certain new anduseful vImprovements in Dust-Collectors;- and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to [o which .it appertainsto make and use the zo pelled by an agitating element into areceiving-chamber.

The obj ect of my invention is to provide a dust collector or strainerthat is simple, effective, and positive in its operation and so 2 5constructed as to cause the dust which is discharged to and vagitatedwithin a chamber by an air-blast to be arrested and prevented fromescaping into the open air while at the same time permittin theair-blast to escape 3o freely from the cham er Without undue backpressure upon the source of air-supply.

In the use of dustcollectors in the dust-re-` ceiving bins ofmachines-,for instance, such as stree't-swee ers-difficulty has arisenfrom v 3 5 the fact that t e dust-collecting medium very frequentlybecomes impaired by reason of its being taxed beyond its capacity by thelarge uantty of dustand fine particles of dirt disc arged into thedust-chamber.

`An object of my 'invention is to reduce" to a minimum the dust to bearrested and settled by the oeration of the dust-collector, .therebygreat y facilitating the work of a paratus of this class, and also todisinfect t e vsweepings or other forms of dust and dirt discharge intothe receiving-chamber.

, Further objects and advantages of my iny vention will be apparent byreference to thefollowing description and the accompanying tralvertical'section of the dust-collector, and

Fig. 3 is a transverse section of a the dust-collector enlarged. I

Referring to the drawings, A indicates the dust chamber or bin of themachine embodying my invention, into which the matter conportion oftaining the dust is discharged through the supply-conduit B which latteris furnished with an air-blast from any suitable sourcefor creating theproper draft therein. l

' l'he dust-collecting mechanism is mounted at one end of the chamber Aand comprises lan o en drum or reel C, which is arranged to revo vcabout its axis and to collect or arrest the particles of dust orother'iine matter as they are drawn therein by the air-draft. The drumor reel C consists' of the spaced' end disks 1, which are conne'cted attheir peripieries by equidistantbars or slats 2. T

ough the center of each of the disks 1 is an o ening 3, surrounding theouter margin of wfiich and secured to the face of the disk is aspacing-collar 4f. Secured to the outer laterally therefrom and fittingwithin a circular opening provided in the vertical side wall of thedust-bin A, which openings act as bearings upon which athe drum or reelis revolved. The collar 6 is provided at its outer margin with avertical flange 7, whichl is adapted to fit closely against the marginof the ,opening'or bearing in the side wall of the bin for the purposeofprotecting it from dust. The rotation of the drum is -eHected bymeansof a' pinion S, en aging a gear-wheel or circular rack 9, secure tothe outer sides of the disks 1, said pinion being actuated by anysuitable means. (Not shown.)

A shaft 12 `extends axially through .the drum or reel C and is supportedand rigidly secured against rotation by cross-bars 13, extendingtransversely of its ends and secured within the collars 6. Upon theshaft 12 and within the reel or drum C are fixed two cams 14, oneadjacent to each of the disks 1. The disks 1 are each provided on theirinner .faces with two axially-arranged concentric flanges 15, througheach'of which flanges are equidistant o enings'or apertures in radialalinement an corresponding in number and space with the bars or slats 2,but radially alternatface of each 'collar 4 is a correspondingly-lshaped collar 5 ,which has a collar 6 projecting IOO Iof

ing therewith. A series of straight horizontal rods. 16, correspondingin number with the number of bars or slats 2, extend across` from onepair of flanges to the other. These IIO i posed between` the shoulder anrods 16 are suitablyfmounted at their ends in the bars or arms 17, whichare' dis osed at right angles to said rods and in t e same plane, andeach passes through a pair of the radial openings in the flanges 15. Thebars or arms 17'are'of suflicient length to project through the innerfiange in proximity to the faces of the cams 1,4. A nut. or shoulder 18on each of the portions 17 between the ianges isr engaged by av coiledsprin 19, interthe outer ange 15.. Theeffect of the spring is .to hold Ithe ends of theportions 17 normally projected inwardly toward' theassociated cam 14.

'20 is a piece of open-meshed fabric and is passed continuously overeach of the slats or ars 2 of the drum or reel C- and under thehorizontal portions of the rods'16, thus forming a fold or cul-de-sac inthe fabric between each pair of bars, as. shown in Fig. 3. The fabric 20 is loosely looped under therods ,16, but has its points of contactwith the outer surfaces of the bars 2 secured against m'ovement byretainingjstrips 21 or other suitable means, when by reason of thepressure of the springs 19 the radial ortions 17 of the rods 16 arepressed inwar ly toward thev cam 14 andthe folds of the fabric are drawntaut, as illustrated in Fig. As the reel or drum revolves the innerextremities of the 'arms 17 come in contact with the raised portions 14of tlevflxed cams, thereby causing the rods 1,6,

with their extremities 17, to be pressed outwardly and allowing thefolds of the fabric 2() to become loose. As the ends of the arms 17-slip off the raised portion 14a of the cam and drop into the abruptdepression 14b thereon the rods 16, actuated by the springs 19, are

caused to resume their'normal osition witha sudden jerk, thus causing te associated fabric fold to fla violently and free itself of allaccumulated ust; Pivoted below the drumor reel C, as at 22, `is a hammeror knocker-arm 23, the striking part of which rests' normally a ainstthe outer ace orsurface of the bars or s ats 2 as they in turn rotateabove the same. As each slat passes out of contact with the hammer thespring 24 at its opposite end causes said hammer to fall against andviolently knock the next succeeding'bar, thus materially aiding infreeing the dust anddirt fromy the cloths 20 and also from crevices orother accumulating-points on the inner surface of the bars or slats.

Stretching across the width of the bin A below the drum C are the wings25, which extend from theflo'or of the bin. A to almost in contact'with.the periphery of the revolving drum orlreel. A strip of flexiblematerialfor instance, such as "leather-is secured tol the upperk edge of-eachwing 25 in' position to have contact with the bars or slats 2 ofthe reel. Thewings 25'are intended to form a receptacle Ain which theparticles freed from the reel C are deposited and also to protect thedeposited matter from the a itating effect of the air-blast as it isexpeller to the'binv throughthe conduit B.

v Secured to each of the radial sides of each of the bars orslats 1 andbetween the slat and the opelbmeshed fabric 20 is awire screen 26, whichextends across the interior width of the'frame or reel and is stretchedinwardly thev distance of the width ofthe folds of the fabric 20. Theinner margin of each screen 26 issuitably secured to a rod, bar, `orstout wire 27, which reaches across the interior of the drum from sideto side and has its ends seated and suitably secured within slots orrecesses 28,formed the eriphery of the outer-ange 15, as shown in ig. 3.pose of this series ofwire screens is to prevent the folds of thefabric20 when an air-blast asses in between them from being blown intolcontact with each' other, which would prevent thel passage of airnthrough the meshes of the cloth.

Around each of the o enings in the vertical side walls of the bin A 1nwhich the bearingcollars 6 fit is-a frame 29, to which is hinged, as at30, a door`31. This door consists of a frame adapted to close' tightlyagainst' the frame 29 on the bin A, or against the side of the binshould said latter frame b e eliminated,

The purand has felt, cotton, woolsponge, hair, moss,

' or the like, as shown at 32, secured within its opening between twowire screens 32a to serve as a sieve or screen for the air which passestherethrough from the interior of therdustbin. ln` the construction ofmachines of this class it has been customary to provide the openingforming the exit for the air-blast with a single gauzeor wire screen, orwith both, the wire screen acting-as a strengthening means for the anze..This method of straining the expelle air of the very fine particles ofdust which escaped the operation of the dust-col-A IIO vpassers-by. Bythe use .of my improved method of providing a body of cellularsubstance-v-such as felt, cotton, wool, sponge, moss, or the like-Withinthe air-exit this dificulty, aswell as thel escaping of the finer-particles of dust from the machine, are obviated, as they air is causedto find ajcircuitous passage therethrough, thus breaking its force itsfree edge.

and causing the dust particles to adhere to the straining substance.

To the rear of the drum or reel C within the bin A is erected arearWardly-'slanting partition 33, which arises from the bottom of thebin and extends to a height with respect to the drum or reel C,substantially as shown.

The top of the partition 33 is formed with a rearwardly-extending flange34, having a downwardly-extending lip 34:st provided 'on As thematter-laden air-blast leaves the conduit Bit strikes'against the rearwall of the bin A and is deflected forwardly by it against the slantingpartition 33 andrequired to traverse the height lof said partition andaround the flange or baffle-plate 34 before entering the drum or reel C.The purpose of the partition 33 andrflange 34 is to impede the progressof the air-blast and cause the particles which are not of sufficientweight to immediately gravitate to the bottom of the bin as they areliberated from the conduit B to strike against and have their momentumarrested thereby, so that only the finer particlesof dust are carried tothe drum or reel C. A sprinkler system is. employed withinthe bin A fordisinfecting the dust discharged thereto and also acting in conjunctionwith the partition 33 to minimize the amount of dust to enter `the drumor reel C. This system consists of the pump 35, the tank or othersuitable source of water-supply 36, in which may be placed adisinfectant, the dischargepipe 37, leading to the rear of the bin A,and the spray-nozzle 38, which latter is positioned to direct the liquida ainst the rear side of the partition 33.j It will thus be seen that agreater portion of the particles of dust and dirt discharged into thebin A that do not immediately fall to the bottom thereof will accumulateon the sprayed side of the partition 33, against which they are carriedby the aircurrent,V and drop therefrom by reason of their accumulatedweight.

The operation of my device is as follows: After the dirt or other matterhas been discharged from the conduit B to the bin A the heavierparticles fall to the iioor and the lighter particles which succeed inpassing around the partition 33 are carried by the aircurrent betweenthe bars or slats 2 of the drum or reel C. The air continues its coursethrough the fabrics 20 out through the circular openings 3 in the disks1 and bearingflanges 7 and thence passes through the porous or cellularsubstance of the door 31 into the open air. The dust as it encountersthe folds of the fabric 2O is arrested and held by the air-pressureagainst the cloth. As the vdrum revolves the ends 17 of the rods 16 comein contact with the fixed cams 14. As the rods 16 17 press u on the faceof the cams they are forced radially outward, overcoming the resistanceof the springs 19. 'I he cloth accumulated on the surface and in themeshes of the fabric. The dust thus loosened drops to the floor of the.bin between the wings 25, by which it is prevented from beingscattered. The knocker-arm 23 is positioned to slip from engagement witha slat 1 and strike the next succeedin one at substantially the timethat the cams ave let go of the arms 17, the bar or slot being struckhaving the fold of cloth neXt to be jerked secured thereto. It isapparent however, that the. hammer may be positioned to strike a -sloteither before or after vits associated fold of fabric has been jerked bythe operation ofthe rod 16, as its object is to impart vibration to thecloth 20 and also the frame of the reel in addition to that due to thejerking movement of the rods 16. EXtremel -ne particles of dust whichhave escaped t e action of the dust-collector above described come incontact with the porous or cellular door 31 and are arrested and helduntil the door is cleaned, which cleaning may take place at convenientintervals.

t is obvious that such changes in the form, proportion, andminor\details of .construction of the parts as fairly fall within thescope of my invention may be made without departing from the spirit orsacrificing any of the advantagesthereof.

Having thus described my invention, what TOC I claim as new, and desireto secure by Letl l member loosely engaging the innerextreinity of eachof said folds, a spring associated with each of said members for'normally retaining the engaged fold taut, and a cam member fixed to theaxis of the reel or drum for,

vcoacting with and imparting an outward radial movement to each of saidfold-engaging members at a fixed point in its travel to cause thetension on the fold to be lessened and suddenly renewed for the purposede,- scribed. A Y

2. In a dust-collector, an open reel or drum having its periphery formedwith equidistant bars or slats, a series of radially-movable rodsconcentrically` secured within the reel lor drum in position to radiallyalternate with the bars or slats, two arms projecting at right i anglesfrom each of said rods and in the same IIO plane, an open-meshed fabricsecured circumferentially ofthe reel or drum and having a' fold disposedbetween each pair of rods and loosely looped ietaining the folds taut,and a cam member fixed axially 'withinl the reel or drum for coactingwith and impartingan outward radial movement to each arm at a fixedpoint in its travel and adapted to permita sudden return of said armtoits normal position,where bythe associated fold is loosened and sud-1o-denly jerked to free itself of accumulated of each at a fixed matter.

3. In a dust-collector, an open reel or drum having its periphery formedwith equidistant bars or slats, an open-meshed fabric securedcircumferentially of the reel or drum and having a fold loosely disposedbetween each pair of bars or slats, a plurality of radiallymovable rodsloosely engagin the folds of fabric, arms rigidly rejecting rom saidrods atri ht angles to t eir body portions and in a ra ial planetherewith, tension means associated with the arms of each rod fornormally holding the enga ed fold of fabric taut, and a cam memberisposed axially within the reel or drum having an abrupt peripheraldepression and coactingwith the ends of said.

arms for causing an outward radial movement point in its line of travel,whereby the associated fabric fold is loosened and drawn taut for the-purpose described.

4. In a dust-collector,'a reel or drum comprising end disks andequidistant bars or slats forming the vperiphery thereof, a pair ofaxiand having its extremities bent toy through the alinin openingsinsaidanges,- -a spring on each.

' open-meshed fabric secured circumferentiall of the reel or drum andhaving -a fold loosely ally-arranged concentric angessecured to theinner faces of the disks openings -disposed in radial aline'ment, an

disposed between each pair of bars or slats, a separate rod engagingeach fold ofthe fabric roject ent end of said rods for causing thefabric folds to be normallvheld under the radially-alining rod,- meanscoacting with said arms for normally and having of two subscribingwitnesses. 1

ber and forme with a rearwardly-project-4 ing flange, arotatable'dust-collecting mechanism mounted within said chamber inadvance of said partition, anda conduit com- 5o partition arising frommunicating wi th the upper part of said chamber in position to directits airdischarge agiinst the rear. wall of the chamber by W.

ich it is directed down and forward against the partition and around theflange thereon before it is permitted to enter thedust-collectormechanism. '6. In comblnation, a chamber, a rearwardly-slantingpartition arising from thebottom of the chamberand having its topterminating below the top ofv the chamber and, formed with arearwardlypro]ect1ng flange, a rotatable dust-collecting `mechanwith theupper part of said chamberin posi- .'-tion to direct its air-dischargefirst against the rear wall of the chamber y which it -isndirectedforward against the partition -and .ism mounted within said chamber 1nadvance -of said partition, a conduit communlcating around the flangethereon before entering the dust-collector mechanism, and means for -v`spraying said partition for the'purplose of gravitating a considerableportion oft e dust y. carried by the air-discharge.

In witness Whereoflhave hereunto signed -my name to this specificationin the presence Witnesses: K CoRNELL SOHREIBER,;

' W'. OWEN.

BERNARD KERN, JR.

